Ultrasonic intrusion detector



FIG. 1 is a perspective view of an ultrasonic intrusion detector showing our new design;

FIG. 2 is a plan view thereof on an enlarged scale;

FIG. 3 is an end view thereof on an enlarged scale; and

FIG. 4 is a plan view thereof on an enlarged scale illustrating the opposite side to that seen in FIG. 1 and FIG. 2. 

The ornamental design for an ultrasonic intrusion detector, as shown and described. 